How To Ventilate Your Attic

Of net free area for every 150 sq.

How to ventilate your attic.

How to properly ventilate your attic. To avoid rotting wood clumping insulation and mold your attic needs to be properly ventilated. Exhaust vents which are located near or on the ridge line of the roof and allow air to leave the attic. How to check attic ventilation.

Intake vents which are located at the down slope edge of the roof aka eaves and allow fresh air into the attic. The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows. If you have either ice dams or moisture buildup improve your attic ventilation. Your actual living space is sealed and insulated at the attic floor the attic is outside this envelope.

To properly ventilate an attic two types of vents are needed. How attic ventilation works. Here are four signs of an unventilated or under. Ventilation can be accomplished using various products and techniques.

In the summer good attic ventilation reduces heat buildup. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. Good ventilation allows the heat and moisture to escape.

Moreover if you have asphalt shingles on the roof attic. Of attic floor space. This means for every 150 square feet of attic floor space there should be 1 square foot of net free area. If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the manufacturer s warranty.

In the winter warm moist air seeps into the attic from the living space below. Begin by making sure your existing system works photos 1 and 3 plugging major air leaks into the attic photo 2 and correcting any other of the common causes of poor attic venting. If those steps don t solve the problem add more soffit vents following the. Ensuring your home has the proper attic ventilation according to these guidelines however can save yourself the stress and hassle of an emergency roof repair.

That keeps your attic dry and reduces ice dams. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. That cuts cooling costs and prolongs shingle life. Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad if not worse.